Tube frame for axminster looms



Jy 15, 1952 w. Y. ROBB TUBE FRAME FOR AXMINSTER LOOMS Original Filed May 19, 1948 INVENTOR WALTER Y. ROBB FIG.3

ATTOR NEY Patented July 15, 1952 UNITED STATES PATENT OFFICE.

TUBE FRAME FOR AXMINSTER LOOMS 6 Claims.

This is a division of my co-pending application Serial No. 27,971, filed May 19, 1948, now Patent No. 2,569,196, for a Tube Frame for Axminster Loom.

This invention relates to improvements in tube frames for Axminster looms.

The yarn spools of Axminster looms are mounted on tube frames carried by transporting chains which move during loom operation to present the tube frames one at a time to a transfer station. After arriving at the transfer station a tube frame is detached from the chains and lowered for a tuft forming operation during the latter part of which it is raised to draw off enough yarn for the next operation. During this drawing off operation the tuft yarns are drawn downwardly through yarn tubes on the tube frame. The tufts are then cut from the spool and the tube frame returned to the chains. e f

There is a present tendency to use yarn spools of large diameter so they will, hold more yarn than the smaller spools heretofore used. When yarn is drawn from a large full spool it approaches the yarn tubes in a direction which tends to draw the'yarn toward the narrower part of'the yarn passage in the yarn tube. The latter have heretofore been made with their upper or yarn receiving ends inclined forwardly and downwardly away from the spool and carrier bar, and because of thisfact a knot in a strand of yarn approaching the mouth of the tube is directed toward the small part of the yarn passage. This condition is accentuated when larger diameter spools are used. It is a further object of my present invention to form the receiving mouths of the yarn tubes in such manner that a knot in the yarn will be directed toward the wider part of the yarn passage in the yarn tube as the tuft yarn moves down in the yarn tube.

With these and other objects inview which will appear as the description proceeds the invention resides in the combination and arrangement of parts hereinafter described and set forth.

In'the accompanying drawings, wherein a convenient embodiment of the invention is set forth,

Fig. 1 is a side elevation of part of, an Axminster loom showing atube -frame in tuft forming position made according to the present invention, 1

Fig, 2 is an enlarged front elevation of one end of the tube frame looking in the direction of arrow .2, Fig. 1,

conveyor system comprises two transporting chains I6 and II between which extend the tube frames T. The chains move down around a socalled pullover shaft I2 which turns periodically in such manner as to stop the chains with a tube frame at a transfer station under the pullover shaft. A transfer arm I3 provided with a clutch I I, one at each side of the loom, then moves toward the tube frame to detach it from the chains, after which the tube frame is lowered into the warp shed W and tilted to the position indicated in Fig. 5. The tube frame is then moved forwardly with respect to the warp shed W to the vertical position shown in Fig. 1. The lay I5 then beats up and the tube frame is givena slight upward or pulling off movement to supply enough yarn for its next tuft forming operation, after which the front and back cutters I6 and M, respectively, cut the tuft yarns from the tube frame. The latter is then returned to the chains and another angular movement of the pullover shaft brings the next tube frame to the transfer station.

The tube frame is made substantially as shown in Figs. 2, 3 and 6. The carrier bar 20 has front and back walls 2| and 22 at the left and right, re spectively, of Fig. 3, connected by top and bottom walls 23 and 24, respectively. Integral with the carrier bar is an elongated substantially semicylindrical reinforcing member or fin 25 illustrated to complete the showing but not claimed herein, since it forms part of the subject matter ofthe parent application.

The carrier bar has on each end thereof a bracket or ear 30, one of them being shown in Fig. 2. The ear may be of usual construction and has two parts one of which is a spool bearing member 3| and the other member 35 of which has an offset tongue 3'5 for cooperation with a transporting chain. A suspension hook 39 pivoted on the bracket 30 ordinarily engages a transporting chain to support the tube frame, but is moved to releasing position by the clutch I4 whenever the tube frame is to be removed from the chain. A yarn spool unit S is journaled in the spool bearing members 3i and has tuft yarns Y wound thereon.

Arranged along the front of the carrier bar is a series of hollow elongated members or yarn tubes 40 through which the tuft yarns Y pass downwardly during the previously described pull-.

ing ofi movement of the tube frame. These yarn tubes are seamless so that they will be con-1 tinuous in transverse section as shown in Fig.

4. Each yarn tube member has an elongated. tuft yarn passageway 4| throughwhich a yarn? Y passes and this passageway is shaped approximatelyas shown in Fig. 4 with a'narrow forward part 42 and a wider rear part 43. The wide part of each passageway is adjacent to the carrier bar 20. a yarn receiving mouth 44.

A group of yarn tubes 40 are secured to a ver- The upper end of each yarn tube has;

tical flat plate 45 extending along and secured at 46 to the front wall 2! of the carrier bar. The yarn tubes have their upper right hand parts as viewed in Fig. 3 secured to the plate 45 in any approved manner, as by welding or copper or silver brazing or soldering, and with the plate form a yarn tube unit. The yarn tubes 43 are preferably made of a non-corroding material, such as stainless steel or similar non-corroding ferrous alloy, and the plate 45 may also be made of a similar metal.

The plate 45 is relatively short, being preferably of a length which is an aliquot fraction of a quarter of a yard, such as three inches. A number of these plates or yarn tube units are arranged along the front wall of the carrier bar so that the yarn tubes will be aligned in the usual manner lengthwise of the bar 20.

This divisional application relates more particularly to the yarn receiving mouths M. The upper end of each yarn tube 40 is inclined as at 50 downwardly toward the opposite or lower end of the yarn tube and toward the wall 21. When a tuft yarn Y having a knot K therein approaches the narrow front part 42 of passage 4| the mouth 44, due to the fact that its plane is inclined, will direct the knot toward the wider art 43 of the yarn passage M. This is particularly true when the diameter of the yarn is large enough so that the passage 4!, if projected upwardly, would pass through the overhanging yarn. When the yarn diameter is smaller a knot will pass directly into the wider part 43 of the yarn passage 4|.

From the foregoing it will be seen that I have provided an improved Axminster loom tube frame having yarn tubes 40 which are seamless and having passing therethrough yarn passages 4| the wider parts 43 of which are near the carrier bar. Furthermore, the yarn receiving mouths 44 are inclined downwardly and toward the carrier bar so that a knot approaching the forward part of the passage 4! will be deflected or directed toward the wider part 43 of the passage. This feature of the yarn tube is of particular advantage when spool units of large yarn diameter are used and a tuft yarn leaving a large diameter package of tuft yarns on the spool would be inclined downwardly and toward the carrier bar and would tend to enter the front narrow part of its yarn tube. There is also provided a yarn tube unit comprising plate 45 and a series of yarn tubes secured thereto having their yarn receiving mouths inclined downwardly and toward the plate.

Having thus described the invention it will be seen that changes and modifications of the foregoing specific disclosure may be made without departing from the spirit and scope of the invention.

What is claimed as new is:

1. A yarn tube for an Axminster loom tube frame, said tube comprising a hollow elongated member with a yarn passage extending longitudinally therethrough, said passage being narrower along one longitudinal edge thereof than along the opposite longitudinal edge thereof, the yarn receiving end of the tube having a mouth inclined from the narrower part of said passage toward said wider part of said passage and in a direction toward the opposite end of the tube.

2. In an Axminster loom tube frame, a carrier bar extending longitudinally of the tube frame, a spool unit above the carrier bar having a part overhanging the barso that a tuft yarn tangential to said part of the spool and directed 1 sage in such manner that a knot in the yarn when engaging the edge of the mouth as the tuft yarn passes into said passage will be deflected toward the wider part of said passage.

3. In an Axminster loom tube frame, a bar extending longitudinally of the tube frame, a spool unit above the bar having a part overhanging the bar so that a tuft yarn tangential to said part of the spool and directed toward the bar is inclined downwardly and toward the bar, and a yarn tube secured to the car under said overhanging part of the spool and having a yarn passage therethrough which if extended upwardly would pass through the spool, said passage being relatively wide at the side thereof adjacent to the bar and relatively narrow at the opposite side thereof, said tube having a yarn receiving mouth at the end of said passage adjacent to the spool the plane of which is inclined downwardly and toward said bar.

4. In an Axminster loom tube frame having a bearing for a tuft yarn spool unit, a carrier bar, a tuft yarn tube on the carrier bar having a yarn passage therethrough which is relatively wide at the side thereof adjacent to the carrier bar and is relatively narrow on the opposite side thereof, said tube having a mouth to receive a tuft yarn drawn from a spool unit into said passage and said mouth being inclined from the relatively narrow part of said passage toward the relatively wide part of said passage in the direction of travel of the tuft yarn through said passage.

5. In an Axminster loom tube frame, a horizontal carrier bar, a tuft yarn tube secured to one side .of the carrier bar having a vertical yarn passage therethrough which is relatively wide at the side thereof adjacent to the carrier bar and is relatively narrow on the opposite side thereof, said tube having a yarn receiving mouth which is inclined downwardly and toward said carrier 6. A yarn tube unit for an Axminster loom tube frame, said unit comprising a flat plate for attachment to the tube frame and a plurality of tuft yarn tubes secured to one side of said plate, each yarn tube having a yarn passage therethrough the side of which adjacent to the plate is relatively wide and the opposite side of which is relatively narrow, each yarn tube having a yarn receiving mouth which is inclined from the narrow side of said passage toward the wide side thereof in a direction toward the opposite end of said tube and toward said plate.

WALTER Y. ROBB.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,631,094 Hathaway May 31, 1927 1,635,671 Hathaway July 12, 1927 2,128,875 Bixby Aug. 30, 1938 2,342,265 Garrity Feb. 22. 1944 

